I have duplicated glyphs, given them new suffixes such as .alt1, .alt2, etc, and have been using these to view design differences in the space center.

However, I am now facing a confusing issue: the Space Center is now displaying glyphs with mixed suffixes – even when I set the suffix to "None" or something specific.

As a simple example, here's an instance where the suffix is set to "None" but the space center displays a.alt7 and q.alt6. This is confusing, as a and q gyphs exist with no suffix.

And here's an instance where the suffix is set to .alt2 but the result shows gyphs with three different suffixes.

This behavior persists even when I quit and reopen Robofont, and gives no messages in the Output Window.

Thanks for any help in solving this confusing issue!

I noticed that the .alt glyphs that were messing up had unicode values, whereas the one that weren't only had unicode values in the base, non-suffixed, glyphs. So, I made a simple script to delete the unicode values from seleected glyphs:

f= CurrentFont()
selection = f.selection

for g in selection:
    # print(f[g].unicodes) # if you want to see unicodes
    f[g].unicodes = "" # sets unicode list to empty
    # print(f[g].unicodes) # if you want to verify blank unicodes

As for Superpolator, I realize that is a separate product, but it's odd that it's somehow preserved the previous versions – if anyone understands why, I'd be interested in knowing. The only way I could fix it there was duplicating my UFOs entirely, to a separate folder, and remaking a new Superpolator document entirely (simply replacing the UFO in question didn't address the issue).

just to be clear, in case someone else comes across this problem in the future:

alternate glyphs should have no unicodes.

here are some articles/discussions in which this recommendation is mentioned:

• An Introduction to OpenType substitution features: Naming your glyphs
• Code points for alternate glyphs

# remove the unicode for the glyph
glyph.unicode = None

# the same glyph can have multiple unicodes
glyph.unicodes =[]

see http://robofont.com/documentation/building-tools/api/fontParts/rglyph/#RGlyph.unicode